Abstract: With fine reservoir description of Pu I Formation of Beiyiquduandong in the Saertu Oilfield, this paper, through three-level research on the sedimentary microfacies, single sand body, and the internal point bar-level configuration, performs an in-depth analysis of the reservoir layer by layer, summarizes a set of effective and practical meandering river fine geologic research methods and processes, and rebuilds the reservoir cognition system. On this basis, this paper establishes a geological model, and conducts remaining oil research after polymer flooding. It is found that after flooding, remaining oil is mainly distributed at top of channel sand body, the imperfect injection-production part and the branching line; the distribution is dominated by rhythmic type, interbed-controlled type and the thin and poor reservoir type.

Key words: Daqing, Saertu Oilfield, sedimentary microfacies, single sand body, internal point bar-level configuration, distribution of remaining oil